We're dividing 631604 by 16 
The aim is to understand the frequency of 16 in 631604.

Let's proceed to step 1:
If we divide 6 by 16, we get 0 and a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 16

Let's proceed to step 2:
16 can be fit into 63 3 times, resulting in a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 15 after subtracting 48 from 63.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 16

Going ahead to step 3:
If we divide 151 by 16, we get 9 and a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
Subtracting 144 from 151 leaves us with 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 16

Advancing to step 4:
16 goes into 76 4 times with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 394.0
The remainder is 12 after subtracting 64 from 76.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 16

On to step 5:
16 goes into 120 7 times with a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 3947.0
Deduct 112 from 120 and we're left with 8.
Fetch the next digit (4) from the dividend, attach it to 8 and continue: 84 / 16

Advancing to step 6:
84 divided by 16 is 5 with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 39475.0
If we take 80 away from 84, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 7:
When dividing 40 by 16, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 39475.2
Subtracting 32 from 40 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
The number 16 fits into 80 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 39475.25
Subtract 80 from 80 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
If we divide 0 by 16, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 39475.25
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
16 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 39475.25
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 39475.25 and a remainder of 0.0.